We have added a Gift Upgrades feature that allows you to gift an account upgrade to another member, just in time for the holiday season. You can see the gift option when going to the Account Upgrades screen, or on any user profile screen.

Yields from harvesting no longer scale with tech or civic progress. Constant yields are:
Forest = 50 Production
Jungle = 25 Production, 25 Food
Marsh = 50 Food
Bananas, Cattle, Fish, Rice, Sheep, Wheat = 100 Food
Copper, Crabs = 200 Gold
Deer, Stone = 100 Production
Note: This mod assumes that you also have a district cost mod, and breaks the district cost formula used in the base game. This is because harvesting yields and district costs scale with the same value.